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Wuhan Huading Power Equipment Co., Ltd.

HDJB-702A microcomputer relay protection tester

Product Details

I. Product Introduction

HDJB-702A microprocessor-based relay protection tester for all
relays and protective devices for testing Each calibration, power
plants, power companies and power units essential test equipment.
Used to detect switchgear, integrated protection devices, the use
of high-speed, high-performance digital control processor as the
control microcomputer, the software application of double-precision
algorithm to generate arbitrary high-precision waveforms of each
phase. As a result of an integrated structure, all the parts
combined with close, short data transmission distance, compact
structure. Overcoming the problem of few output waveform points
caused by the long data communication line and narrower frequency
band in the direct control type monitor and control instrument of
the notebook computer.

1.D / A conversion and low-pass filter using high-speed high D / A
converter to ensure the full range of current, voltage accuracy and
linearity.

Due to high D / A resolution and high fitting density, small
waveform distortion, small harmonic components and low requirements
for low-pass filters, it has good transient characteristics,
phase-frequency characteristics and amplitude-frequency
characteristics, Achieve accurate phase shift, harmonic
superposition, high frequency can also ensure high accuracy.

2. Voltage, current amplifier phase current, voltage does not use
up-flow, booster, and the use of direct output, the current and
voltage sources can be directly output from the DC to a variety of
frequency components of the waveform, such as square wave, each
Sub-harmonic superimposed waveforms, fault transient waveforms,
etc., can better simulate the various short-circuit current and
voltage characteristics.

Power amplifier circuit using imported high-power high-fidelity
modular power devices for the power output stage, with careful,
reasonably designed cooling structure, with sufficient power
redundancy and heat capacity. Amplifier circuit has a complete
overheating, over current, over voltage and short circuit
protection. When the current loop over-current occurs when the
voltage loop overload or short circuit, automatically limit the
output power, turn off the entire power amplifier circuit, and
gives the alarm signal display. To prevent long-term work caused by
high current amplifier circuit overheating, the device set the
software under high current limit. 10A and below the output device
can work for a long time, when the current exceeds 10A, the
software starts a limited time, the time limit to, the software
automatically shut down the power output and give an alarm
indication. The greater the output current, the shorter the limit.

3. Open into and out of the amount of switch input circuit
compatible with empty contacts and 0 ~ 250V potential contacts.
Potential mode, 0 ~ 6V for the combined, 11 ~ 250V points. Switch
can easily switch on each phase of the action time and action time
difference measurement. Open into the part of the host operating
power, power amplifier, etc. are isolated. Open to the ground for
the suspension, therefore, open into the public part of the
current, voltage common part of the UN, IN are not the same. Binary
input potential direction, the common terminal should be connected
to the negative terminal, open into the negative terminal potential
to ensure that the public terminal potential higher than the open
terminal. Field wiring, should be open into public termination +
KM, the negative terminal of the contacts open into the terminal.
If it is reversed, it will not be detected correctly.

Open part of the relay empty contact output. Output capacity of DC:
220V / 0.2A, AC: 220V / 0.5A. Switching output and voltage,
current, open into the other parts are completely isolated. Each
out of the amount of action in each test module are different,
please refer to the detailed instructions of each module software.

Two. Product Features:

1. Standard 4-phase voltage 3-phase current output with 4-phase
voltage 3-phase current output, various combinations can be easily
output for various types of protection test. Each phase voltage can
output 120V, the current three and output 120A, the fourth phase
voltage Ux is multi-function voltage, can be set to 4 kinds of 3U0
or check the voltage of the same period, or the output of any
voltage value.

2. Stand-alone easy operation Stand-alone by a convenient and
flexible rotating mouse through the large-screen LCD screen to
operate, all Chinese display. Can be completed most of the test
site test, a variety of relays and computer protection can be
verified, and can simulate a variety of complex transient,
permanent, conversion failure of the entire group of tests. Boot to
use, easy to operate.

3. Dual operation mode, connect the computer to run Through the
full set of Chinese operating software on the Windows platform, can
carry out a variety of large complex and more highly automated
calibration work, you can easily test and scan a variety of
protection settings, real-time storage Storage test data, display
vector, draw fault waveform, online print report.

4. The powerful software can be completed a variety of high degree
of automation of a large complex calibration work, such as
three-phase differential test, power cut fast, prepared from the
vote test, line protection check the same period reclosing, etc.,
can easily test and scan Various protection settings, fault
playback, real-time storage of test data, display vector, online
print reports.

6 large-screen LCD display The machine uses 320 240 dot-matrix
large-screen high-resolution graphic LCD display, all the operation
process are set on the display, the interface and the test results
are finished display, showing intuitive and clear.

7. Self-protection The use of a reasonable design of the cooling
structure, and has a sound and comprehensive protection of a
variety of protection and power soft-start, and some fault
self-diagnosis and blocking functions.

8. With an independent dedicated DC power output device with a 110V
and 220V dedicated adjustable DC power output.

9. Cost-effective cross-professional joint design products,
integrated multi-disciplinary advanced scientific and technological
achievements. Both large-scale tester performance, and the price of
a small tester, with a high cost performance.